C31232233133313221211113313331333133313331212111133133313232211   >>    C3123223313331322121111331333133313331333121211113313331323221   <<    C31232233133313221211113313331333133313331212111133133313232213   >>      C31232233133313221211113313331333133313331212111133133313232212   >>